copying 2d array from C JNI.

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ganeshamutha@gmail.com - 08 Mar 2007 09:13 GMT

Hi,

how to copy the 2D array to java from C which connected with
JNI.

i used following statement 1D array which was worked very
fine..

(*env)->SetDoubleArrayRegion(env,ans,0,len,res);

ans -> 2D array declared in Java
res -> 2D array declared in C

when i changed the dimension i got following warning
which making shared lib..

: warning: passing argument 5 of '(*env)-

>SetDoubleArrayRegion' from incompatible pointer type

What should i do to pass 2d array to java from C.. how do
remove this warning .

Please any one of you help me out to solve..

Thanks in advance,
Ganesh.

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Gordon Beaton - 08 Mar 2007 09:46 GMT

> how to copy the 2D array to java from C which connected with
> JNI.

[...]

> : warning: passing argument 5 of '(*env)->SetDoubleArrayRegion' from
> incompatible pointer type

Each element of the 2D array is itself a 1D array. The 2D array is
array-of-Object, not array-of-Double.

You need to do this 1 array at a time, i.e. iterate over the 2D array,
then handle each element just like the 1D case.

/gordon

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copying 2d array from C JNI.

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